Stkap-tighteirr



E. l. BROOKS.

STRAP TIGHTENING TOOL.

APPLICATION FILED on. 23, 1918.

1 3 1 3 6 6 9 Patented Aug. 19, 1919.

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Eda/070 I .Braoks s A, orr o.

nnwean J- .Bno K or EAST QBANGE, new wastr- A Y BAP- GH N N OOL-v pe iti n of ters e t- Pa ented Aug 19, 1919 Application filed October 23,1918. serial No, 259,388.

To all'whom it may concern:

Be it known that I, EDWARD J. BRooKs, a citizen of the United States,anda resident of East Orange, in the county of Essex and State of NewJersey, have invented certain new and useful Improvements in Strap-Tightening Tools, of which the following is a specification. The presentinvention relates generally to a strap tightening device such as is usedfor tightening the ends of straps that are passed around containers suchas wooden boxes,

bales, etcl, and has for its main obje a construction in which the straptightening member is automatically released from engagement with thestrap upon the completion of its feeding StrQkBso that it may have areturn stroke out of engagement with the stra to be tightened.

Tiie invent o c sts n a shif g fil crum connection between thetightening member and the carrier on which it is mounted so arrangedthat engagement of the memher and strap willbe caused during thef-dingstrokeof said member and disengagement of the strap and tighteningmember willtake place-so thatthe tighten ng meme her may have a returnstroke outoi' engage1 ment with the strap,

In he ompanyi g d w ngs, h invention is disclosed in a concrete andpreferred form in which-f. T

Figure 1 is a vertical sectional view oi a strap tightening deviceembodying. the 111- vention,the tightening member being shOWI} at the ofits return stroke.

Fig. 2 is a View pa t y in eleva io and.

r t iv n e ion, ith the tightening H1931",

or shown at the end of its feed stroke, Fig- 3 is a t p plan view of tparts 'libsitiol hown in ig- 2, a Por i n of the handles being brokenaway, 7

l indicates a support of any suitable con tmction andheretn ing he ormofa base plate having inlaid face portion 2 whose up per surface isroughened so as to properly cooperate with the members presently to bedescribed. 3 is a carrier, in this instance constitntlng a side allrising from the base plate, said carrier being connected at one H sideto said base plate as shown in Figs. 1

and 3 and having its other side wall 3 provided with an opening 4 toadmit of insertion edgewise of the strap ends 5. It will also beunderstood that the ends 6 and 7 of the device are open so that theStrap ends the side wall 3 and passing'through a cam slot 10 formed insaid tightening member. This cam slot is provided with an upper portion11 and a lower portion 12 that merge into each other'as shown, therebeing never: hel ss an i rvening dg .13 as ndi ated, Th low r nd of t etight n ng member s pr d d ith a fa e p rtion H.- he e Part c m slo 1 iss rel ted r Po i one wi pe t vthe mo emen o tighte in mem e 8 t at du ngth mei r p rt on of he fe r ke o said, mem r p n 9 w ll occupy the upperpQr tionll ofthe cam slot, s the mem e 8 is mo ed to th r ght in F g l;i fac 14 w l en a e he s rap ends '5. pon the suppo t land i ause e srap t be t ghten d i a man er Wel derstood. Af e t e member 8 ha movepast a vertical lin d a n ub tially oug -the cen e of p n 9 i will bappr a h ng the n of its 'feedingetr ke an will Sh 80 that t e P 19 w loc upy-the Suitable mea s r pro de in h i g he's rab ends so as topreven re a e m v men thereof du ing he return St e f memb 8- 1.1this'ii sten e d te f pi ot ly 111 rie t 6 o the c rr 3', itslower endlbeing normally urged into engagement with the strap; ends by" reasonoif'springl8 which has a hearing 19 on h an dle'port10n 2U. It will beseeii'thatwhile' detent 15 will prevent" retrograde movement of st ap enn itv wil e m t ghten ng. 9f the strap ends under t e influence ofmember 8 during its feeding stroke.

Suitable means for releasing said detent are provided in this instancetaking the form of a trigger 21 pivotally mounted at 22 on the handle 20and bearing agalnst Pie 23' QQPW? l .1? Will be seen that with respectto each other'atthe endfof a by 'moving trigger 2 1 from i the positionshown in Fig. 2 into a higher position, said trigger will engage pin 23and lift detent so that its lower end 17 no longer engages the strapends. 24: indicates a stop limiting the movement of trigger 21 andagainst which it is normallfy held by gravity;

25 indicates a stop to limit the forward feeding movement of member'8and 26 indie catesa stop portion on carrier 3which limits the "movementof member 8 at the end of itsreturn stroke. In order tofa'cilitatemainipulation' of the device a handle 27 ispro vided, saidhandle being attached to side wall 3 and which the operatorimay graspWhile manipulating member 8.

"I claim' r r "11A strap; tightening tool comprising a 1 support for theends of a strap tobe tighten'ed, acarrier, an oscillatory tighteningmember, and a shiftingfulcrum' connection with respect to each other atthe endof a 2. A strap tightening tool comprising: a

a support for the ends of astrap tote tight-y ened, a carrier, anoscillatory tightening member, and a shifting fulcrum connection betweenthe carr er and member comprising a-@ pin, and a 'slot that iautomatically" shift Q stroke of the tightening.member in 'ei therdirection, the tightening member engaging the strap during feedingstroke and dis engaging the strap"duringits return stroke;

and means for preventing retrograde movement, of'the strap ends duringthe return 7 the strap and admitting of a return stroke thereof out ofcontact with said strap, thef b V stroke of the tightening member. 7

3. A strap tightening tool comprising: a support for the ends ofastraptobe tight; ened, a carrier, atightening member, a shifting fulcrumconnection between the carrier V will occupy the upper'part of said camslot thereby causing said member. to engage Gobi u otlthis patentmay. beobtained and: member consisting of a pin and a' two 7 part-cam slotfso"relatedto the movement of thememberv that during the major 'portion ofthe feeding stroke thereof, said pin strap on-support, saidv pin at theend of the feeding stroke of. said frnember aura matically shifting to,the lower-part of the slot-rthereby;Causingsaid member to ;dis-- 3 dayof-October, 1 918 o engage the strap and admitting of a return strokethereof out of contact with said strap, the pm again returningautomatically to the upper part of slot at the end of the;

return stroke of said member. 7

4. Astrap tightening tool comprising: a

support for the ends of a strap to :be tight- 7 ened, a carrier, atightening member, a shifting fulcrum connection between the carrier andmember consistlng ofa plnanda two,

part cam slotrso related to the movement of the member that during themajor portion of the feeding stroke thereof, said pin will occupy theupper partof saidcam slot thereby causing'said'member to engage strap onsupport, said pin at the end of the feeding stroke of said memberautomatically shifting to the lower part of the slot thereby causingsaid member to disengage the strap and admitting of a return stroke,thereof-'outof contact with said strap, the

pin again returning automatically to the upper part of slot-at the endof the return stroke of said member, and means for pre' 'venting'iretrograde movement of the strap ends during the-return stroke of thetight- 7 en ing member.

supportfor the ends of a strap to be tightened, af'carrier, atightening.member, a

'. shifting fulcrum connection between the carrier' and memberconsisting of a pin and a two part cam slot sorelatedto the movement ofthe memberthat during the'major poretion of thejfeeding stroke thereof;said pin) 'Will occupy the upper part of said cam slot" thereby causingsaid -member to engage a feeding stroke of saidjmember automati strap'on' support, said pin at the: end of the 55A strap t1ghtening toolcomprising: a-

cally shifting to the lower part'of the slot thereby causing. saidmember to disengage pin again returning automatically to the upper partof slot at the end of thefreturn stroke of said member, and a springactuated detent admittingof tightening of the strap: ends during-thefeeding stroke of the tightening member-and preventing retro grademovement of the strap ends" during" a the return stroke of thetightening member Signed at New York, in the' county of New VYorkan dState of New York, this 17 th v f EDWAR r BRoo-Ksf' is

